sheathed banana jack *dust cap*?

[electrolust]

My new test lead set came with little dust plugs sealing the sheathed 4mm banana plugs.  Anyone know of a dust cap for a sheathed banana jack?  Imagine http://www.caltestelectronics.com/ctitem/165-safety/CT2989 but the tail end of the sheath is sealed instead of having the plug and wire assembly parts.